CVE-2021-31196 Microsoft Exchange Server Information Disclosure
Attackers can execute arbitrary code on Microsoft Exchange Server, requiring immediate patching by administrators.
- Exploited in the wild
- Since 21 Aug 2024
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-31196?
CVE-2021-31196 is a high-severity code injection vulnerability in Microsoft Exchange Server, published on 14 Jul 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Microsoft Exchange Server Remote Code Execution Vulnerability
Which versions are affected by CVE-2021-31196?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2021-31196?
No fix has been published for CVE-2021-31196 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 11 Sep 2024.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-31196 being exploited?
Yes. Attackers have exploited CVE-2021-31196 in the wild since at least 21 Aug 2024.
Other vulnerabilities in Microsoft Exchange Server
- CVE-2024-21410 Microsoft Exchange Server Privilege Escalation
- CVE-2021-34473 Microsoft Exchange Server Remote Code Execution
- CVE-2021-26855 Microsoft Exchange Server Remote Code Execution
- CVE-2021-34523 Microsoft Exchange Server Privilege Escalation
- CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data
Sources
Also known as GHSA-5jv9-cff9-2j3m.